During the Television Critics Association summer press tour, TV Guide managing editor Alex Zalben reports that The CW announced a two-episode musical crossover between Supergirl and The Flash. The crossover will occur around episode 13 of each TV show’s respective new season.

Here’s what we know about The Flash and Supergirl’s musical crossover episode from the TCA panel:

The crossover will use pre-existing songs (presumably similar to the structure of Glee), though there may be one original song per episode.

Arrowverse producer Greg Berlanti said the cast often sing while on set and they “like to use all of the actors’ talents.”

Of course, there are likely to be fans of The CW’s DC Comics universe who may not be excited by the prospect of a musical episode – let alone two musical episodes across Supergirl and The Flash. Certainly, the gritty tone and focus on street-level crime that Arrow kicked off the universe with doesn’t necessarily lend itself to characters breaking out into song or musical numbers. In fact, Arrow star Stephen Amell voiced his opposition to a musical episode earlier this year.

That said, both Supergirl and The Flash have been established with lighter and, at times, more silly tones than Arrow and even, arguably, Legends of Tomorrow. Additionally, as Berlanti points out, The CW’s DC Comics series star a number of musically talented actors beyond Benoist and Gustin; Supergirl’s Laura Benanti is a Tony Award-winning actress while Jeremy Jordan has Broadway musicals and NBC’s Smash on his resume, and The Flash’s Jesse L. Martin starred in the original Broadway run and movie adaptation of Rent – just to name a few of the musically talented stars of the Arrowverse.

In terms of how The CW could logically implement a musical element to the crossover, many (including us here at Screen Rant) have suggested the DC Comics villain Music Meister, who appeared on the animated series Batman: The Brave and the Bold voiced by Neil Patrick Harris. It remains to be seen if The CW will use Music Meister – and, if so, whether Harris will return to the part, though some fans have suggested Hamilton’s Lin-Manuel Miranda would also be a good fit for the character.

As of now, it’s too early to know much about the musical crossover between The Flash and Supergirl as it seems likely the shows’ producers and writers are still working on crafting the episodes themselves. Still, since production on The Flash’s season 3 and Supergirl’s season 2 is underway, it’s possible we’ll learn more in the coming weeks.

The Flash season 3 will premiere Tuesday October 4th at 8pm on The CW, Arrow season 5 will premiere in the same timeslot on Wednesday October 5th, Supergirl season 2 on Monday October 10th, and Legends of Tomorrow season 2 on Thursday October 13th.